The Algebraic Metalanguage
 
 
 
 
 
 
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Mike Gerwitz f8c28655dc tamer: parse: Split into multiple modules
This abstraction has grown quite a bit, and it's time to start formalizing
it a bit.  This split doesn't change any behavior, but it does start to make
it easier to reason about by clearly stating the broad components and how
they interact with one-another.

This doesn't yet move the tests; those will come next, but they are very
few. The reason I gave previously for this was because (a) they're tested
indirectly via the systems that utilize them and (b) because the abstraction
was not yet settled on the process was already very expensive.  No test
coverage was lost---it's only that failures were potentially harder to debug
on test failures, but in practice not even this was true, because the deeply
expressive types all but ensured that, if it compiles, it will function in a
way that is expected.  Unit tests and documentation for this system will be
added once I'm sure that this abstraction is in a proper state.

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README.md

TAME

TAME is The Algebraic Metalanguage, a programming language and system of tools designed to aid in the development, understanding, and maintenance of systems performing numerous calculations on a complex graph of dependencies, conditions, and a large number of inputs.

This system was developed at Ryan Specialty Group (formerly LoVullo Associates) to handle the complexity of comparative insurance rating systems. It is a domain-specific language (DSL) that itself encourages, through the use of templates, the creation of sub-DSLs. TAME itself is at heart a calculator—processing only numerical input and output—driven by quantifiers as predicates. Calculations and quantifiers are written declaratively without concern for order of execution.

The system has powerful dependency resolution and data flow capabilities.

TAME consists of a macro processor (implementing a metalanguage), numerous compilers for various targets (JavaScript, HTML documentation and debugging environment, LaTeX, and others), linkers, and supporting tools. The input grammar is XML, and the majority of the project (including the macro processor, compilers, and linkers) is written in a combination of XSLT and Rust.

TAMER

Due to performance requirements, this project is currently being reimplemented in Rust. That project can be found in the tamer/ directory.

Documentation

Compiled documentation for the latest release is available via our GitLab mirror, which uses the same build pipeline as we do on our internal GitLab instance. Available formats are:

Getting Started

To get started, make sure Saxon version 9 or later is available and its path set as SAXON_CP; that the path to hoxsl is set via HOXSL; and then run the bootstrap script:

$ export SAXON_CP=/path/to/saxon9he.jar
$ export HOXSL=/path/to/hoxsl/root

$ ./boostrap

Running Test Cases

To run the test cases, invoke make check (or its alias, make test).

Testing Core Features

In order to run tests located at core/test/core/**, a supporting environment is required. (e.g. mega rater). Inside a supporting rater, either check out a submodule containing the core tests, or temporarily add them into the submodule.

Build the core test suite summary page using:

$ make rater/core/test/core/suite.html

Visit the summary page in a web browser and click the Calculate Premium button. If all test cases pass, it will yield a value of $1.

Hacking

Information for TAME developers can be found in the file HACKING.

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.